Multi-ply bag and method of producing the same



May 15,1934. E. w. swEENl-:Y

MULTI-PLY' BG AND METHOD OF VPRODUCING' THE SAME Filedl Sept. l2, 1931 2 Sheets-Sheet l INVENTOR Eugene W.' Sweeney BY y y f' A EY.5

2 Sheets-Sheet 2 INVENTOR ne Wween y. A ORNEYS E. w`. swEENEY MULTI-FLY BAG AND METHOD OF PRODUCING THE SAME Filed Sept. l2, 1931 May 15, 1934.I

Patented May 15, 1934v PATENT OFFICE MULTI-FLY BAG AND METHOD OF PRODUC- ING vTHE SAME Eugene W. Sweeney, Brooklyn, N. Y., assgnor to Arkell Safety Bag Company, New York, N. Y., a corporation of New York Application September 12, 1931,4Serial No. 562,435

9 Claims.

. My invention relates to a multi-ply bag, and has special reference to such bags for' holding cement and other iinely divided material, and further relates to a method of producing the same.

One of the objects of my invention is to provide a novel and improved valve for a bag of this character, and method of producing the valve.

Another of the objects of my invention is to provide a valve for a bag which when closed effectively prevents sifting of the contents therethrough.

Referringv to the accompanying drawings,

Figure 1 is a plan view of a strip from which one form of my improved bag may be constructed;

Fig. 2 isa view in perspective of one end portion of a bag tube formed from the strip;

Fig. 3 is a sectional view on an enlarged scale taken on the line 3-3 of Fig. 2;

Fig. 4 is a side view'of said end portion of the bag tube when attened preparatory to forming a Satchel end thereon;

Fig. 5 is a side view of one end b g;

ig. 6 is a sectional view, on an enlarged scale, taken on the line 6-6 of Fig. 5;

Fig. 7 is a view in perspective of one end portion of a modiiied form;

Fig. 8 is a sectional view, on an enlarged scal taken on the line 8-8 of Fig. 7.

My invention is illustrated in the drawings as embodied in a five-ply paper bag of the type of the one described and claimed in the patent to Bartlett Arkell, Multi-ply bag and method of producing the same, No. 1,805,067, dated May 12, 1931. As shown, this bag is formed from a strip 2 of paper or other' suitable material which is wound upon itself to form a cylindrical bag tube (Fig. 2), the several convolutions or plies of the tube being secured together by adhesive 6 suitably applied to the strip previous to winding. VVJien the tube has been thus formed, it is attened on dametrically opposed lines 8'. In Fig. 5, one end of the bag tube is shown closed by a satchel end comprising end ilaps 10 and 12, and side naps 14 and 16, the side flaps overlapping and being secured together and secured to the end flaps by adhesive in the usual manner.

To provide my improved valve in the bag, the strip 2, previously to winding, is provided with a plurality of slits 18 which are arranged parallel to and spaced different distances from one of the longitudinal edges of the s trip, and adhesive may be applied to one side of the strip substantially as shown.

of the completed The slits 18 aren so arranged that in the comlpleted bag tube shown, they extend across one of the edges of the attened tube and are spaced apart from the slit which occurs in the outermost ply toward the end of the tube. The adhesive 6 is so applied as to secure the several plies together adjacent the ends of the slits on the lines 20, and to secure the portion of each ply to the rear of its slit to the superposed ply as indicated in Figs. 3 and 6. The slits are so positioned that in the Satchel bottom they occur in the end ilap 10 thereof.

With this construction of valve, it will be apparent that the filling nozzle for the bag may be inserted, first through the slit 18 in the outermost ply of the flap, then through the slit in .the next ply, then through the slit in the third ply and projected into the bag between the ends of the third and fourth plies. When the nozzle is withdrawn from the valve and the valve is closed by the pressure of the contents of the filled bag, it will be apparent that there is no danger of any substantial sifting of the material through the valve during the handling of the bag. In effect, my improved valve is made up of a plurality of valve sections and they all cooperate to prevent sifting. In case any material works through the rst section it is shut off from further movement through the valve by the second section and so on, and by thus making the valve of a sufficient number of sections, depending on the nature of the material, satisfactory results are secured. By pasting each ply adjacent the rear portion of its slit to the overlying ply, and the several plies together adjacent the ends of the slits, there is no danger of the nozzle catching on the walls of the slits, and the nozzle may be easily inserted and removed.

In Figs. 7 and 8 of the drawings instead of the valve being shown in one of the end aps of the Satchel bottom, it is embodied in one of the side walls of the bag. In this form, the valve slits 22 in the three outermost plies may be arranged longitudinally of the bag, and sufliciently close to theV top thereof as to permit the end of the nozzle to be positioned at a high enough level to effect substantial filling of thebag. In this form, the material of the.outer ply about the slit therein may A be reinforced by a piece 24 of lfabric or other suitable material.

yWhile my improved valve is particularly adapted for use in a Satchel ended wound bag, it obviously may be similarly incorporated in bags in which the plies are made up of separate sheets, whether theends of the bag are closed by Satchel ends, sewed seams or other means.

As will be evident to those skilled in the art,

my invention permits various modifications without departing from the spirit thereof or the scope oi' the appended claims.

What I claim is:

l. A multi-ply bag of the class described provided with a valve comprising openings in superposed plies respectively, successively arranged in spaced relation from the outerl toward the inner end of the valve, said openings being so arranged that in the insertion of a lling nozzle through the valve the nozzle may pass successively through l said openings.

2. A multi-ply bag of the class described provided with 'a valvecomprising openings in superposed plies respectively, successively arranged -in spaced relation from the louter toward the inner end of the valve, with a portion of each ply adjacent the rear of its opening secured to the overlying ply. 1

3. A multi-ply bag of the class described provided with a valve comprising openings in superposed plies respectively, successively arranged in spaced relation from the outer toward the inner end of the valve, with a portion of each ply adjacent the rear of its opening secured to the overlying ply and thevportions of the plies adjacent the sides of said openings secured together.

4. A multi-ply bag of the class described provided with a valve comprising slits in superposed plies, respectively, arranged in parallel relation and successively spaced apart from the outer toward the inner end of the valve, said slits extending transversely of the valve whereby in the insertion of a lling nozzle through the valve the nozzle may pass successively through the openings provided by said slits.

5. A multi-ply bag of the 4class described providedwith a valve comprising slits in superposed plies respectively, arranged in parallel relation transversely of the valve and successively spaced apart from the outer toward the inner end ot the valvevvvith the portion of each ply adjacent the rear of its slit secured to the overlying ply and portions o! the plies adjacent the endsl of the slits secured together.

6. A multi-ply bag of the class described provided with a satchel end and a valve in one of the end flaps o! the satchel and comprising transverse slits in superposed plies respectively, arranged in parallel relation and successivelyspaced apart from the outer toward the inner end of the valve, the slit in the outer ply of the flap being arranged adjacent one end of the side flaps oi the satchel end, whereby in the insertion of a filling nozzle through the valve, the nozzle may passsuccessively through the openings provided by said upon itself a plurality of times which comprises im forming slits in the strip previously to winding, arranged parallel to and at different distances from one of the longitudinal edges or the strip and applying adhesive to the strip -so that when the strip is wound up the slits in the several plies are successively spaced apart with the portion of each ply to the rear of its slit secured to the overlying ply and the portions oi the slitted plies adjacent the ends of the slits secured together.

9. A multi-ply bag of the class described provided with a valve comprising valve openings in the several plies, respectively, said valve openings being spaced apart from the outer toward the inner end of the valve and the portions of the plies extending between said openings forming the wall of the valve, whereby in the insertion of a filling l -nozzle through the valve the nozzle may pass successively through said openings.

EUGENE W. SWEENEY. 

